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GHSA-95x4-j7vc-h8mfmedium5.3

ReactPHP's HTTP server continues parsing unused multipart parts after reaching input field and file upload limits

Check your stack

The advisory, in context

Summary

Previous versions of ReactPHP's HTTP server component contain a potential DoS vulnerability that can cause high CPU load when processing large HTTP request bodies. This vulnerability has little to no impact on the default configuration, but can be exploited when explicitly using the RequestBodyBufferMiddleware with very large settings. This might lead to consuming large amounts of CPU time for processing requests and significantly delay or slow down the processing of legitimate user requests.

Patches

The supplied patch resolves this vulnerability for ReactPHP.

Workarounds

  • Keeping the request body limit using RequestBodyBufferMiddleware sensible will mitigate it.

  • Infrastructure or DevOps can place a reverse proxy in front of the ReactPHP HTTP server to filter out any excessive HTTP request bodies.

References

A similar vulnerability was discovered in PHP recently, see also PHP's security advisory (CVE-2023-0662). The fix is based on the PHP-FPM fix.

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

react/http Packagist
Ecosystem versions

From 0.8.0 before 1.9.0

Fixed in 1.9.0

17 explicitly affected versions

v0.8.0, v0.8.1, v0.8.2, v0.8.3, v0.8.4, v0.8.5, v0.8.6, v0.8.7, v1.0.0, v1.1.0, v1.2.0, v1.3.0, v1.4.0, v1.5.0, v1.6.0, v1.7.0, v1.8.0

View affected-version evidence
{
  "ranges": [
    {
      "events": [
        {
          "introduced": "0.8.0"
        },
        {
          "fixed": "1.9.0"
        }
      ],
      "type": "ECOSYSTEM"
    }
  ],
  "versions": [
    "v0.8.0",
    "v0.8.1",
    "v0.8.2",
    "v0.8.3",
    "v0.8.4",
    "v0.8.5",
    "v0.8.6",
    "v0.8.7",
    "v1.0.0",
    "v1.1.0",
    "v1.2.0",
    "v1.3.0",
    "v1.4.0",
    "v1.5.0",
    "v1.6.0",
    "v1.7.0",
    "v1.8.0"
  ]
}

References